package com.thaiopensource.validate.nvdl;

/**
 * An action that allows any element.
 */
class AllowAction extends NoResultAction
{
  /**
   * Creates this no result action with a given mode usage.
   * 
   * @param modeUsage
   *        The mode usage.
   */
  AllowAction (final ModeUsage modeUsage)
  {
    super (modeUsage);
  }

  /**
   * Perform this action on the section state.
   * 
   * @param state
   *        The section state.
   */
  @Override
  void perform (final SectionState state)
  {
    state.addChildMode (getModeUsage (), null);
    state.addAttributeValidationModeUsage (getModeUsage ());
  }

  /**
   * Get a new allow action with a mode usage with the current mode changed.
   * This is useful when we have modes extending other modes as we need to get
   * the actions from the base mode as actions on the new mode.
   */
  @Override
  NoResultAction changeCurrentMode (final Mode mode)
  {
    return new AllowAction (getModeUsage ().changeCurrentMode (mode));
  }
}
